KERN MBB User manual

KERN & Sohn GmbH
Ziegelei 1
D-72336 Balingen
E-Mail: [email protected]
Tel: +49-[0]7433- 9933-0
Fax: +49-[0]7433-9933-149
Internet: www.kern-sohn.com
Operating instructions
Baby scale
KERN MBB
Version 1.1
09/2009
GB
MBB-BA-e-0911

MBB-BA-e-0911
2
GB KERN MBB
Version 1.1 09/2009
Operating instructions Baby scale
Contents
1Technical data __________________________________________________ 4
2Declaration of -Conformity________________________________________ 5
3Basic directions (general information) ______________________________ 6
3.1 Intended use _____________________________________________________ 6
3.2 Inappropriate use _________________________________________________ 6
3.3 Guarantee _______________________________________________________ 7
3.4 Monitoring the test substances______________________________________ 7
4Basic safety directions___________________________________________ 8
4.1 Observing the directions included in the Operating Instructions __________ 8
4.2 Staff training _____________________________________________________ 8
5Transport and storage ___________________________________________ 8
5.1 Check upon delivery_______________________________________________ 8
5.2 Packaging _______________________________________________________ 8
6Unpacking, installation and starting________________________________ 8
6.1 Place of installation, place of use ____________________________________ 8
6.2 Unpacking _______________________________________________________ 9
6.2.1 Scale assembly and positioning ___________________________________________ 9
6.2.2 List of items delivered / Standard accessories: ______________________________ 11
6.2.3 Mounting instructions for model with wall bracket ____________________________ 11
6.3 Mains socket ____________________________________________________ 11
6.4 Battery operation (inserting and removing batteries)___________________ 11
6.5 Initial start-up ___________________________________________________ 11
6.6 Adjustment _____________________________________________________ 12
6.6.1 Procedure when adjusting ______________________________________________ 12
6.7 Menu overview __________________________________________________ 13
7Operation _____________________________________________________ 17
7.1 Operating elements ______________________________________________ 17
7.1.1 Display _____________________________________________________________ 17
7.1.2 Display view _________________________________________________________ 17
7.1.3 Overview of keyboard__________________________________________________ 18
8Using the scale ________________________________________________ 18
8.1 Weighing _______________________________________________________ 18

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8.2 Taring__________________________________________________________ 18
8.3 HOLD function __________________________________________________ 19
9Error messages________________________________________________ 19
10 Service, maintenance, disposal _________________________________ 19
10.1 Cleaning _______________________________________________________ 19
10.2 Service, maintenance_____________________________________________ 19
10.3 Disposal________________________________________________________ 19
11 Troubleshooting _____________________________________________ 20

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1 Technical data
KERN MBB 15K5 MBB 20K5
Read-out (d) 5 g 5 g
Weighing range (max.) 15 kg 20 kg
Reproducibility 5 g 5 g
Linearity 10 g 15 g
Recommended calibra-
tion weight, (class)
10 kg
(M3)
20 kg
(M3)
Signal rise time (typical) 2 - 3 s
Warm-up time 10 min
Operating temperature + 5°C …. + 35°C
Mains adapter 9 V / 100 mA
Power supply Operation with 6 x 1.5 V battery supply, AA type batteries
Operation time 60 h
Auto-Off function After 3 min without load change (possibility of setting)
Operating temperature + 5°C … + 35°C
Storage temperature - 20°C … + 60°C
Air humidity max. 80% (non-condensing)
Housing (W x D x H) mm 550 x 240 (platform)
210 x 110 x 50 (terminal)
Total weight kg (net) 4.0

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2 Declaration of -Conformity
KERN & Sohn GmbH
D-72322 Balingen-Frommern
Postfach 4052
E-Mail: [email protected]
Tel: 0049-[0]7433- 9933-0
Fax: 0049-[0]7433-9933-149
Internet: www.kern-sohn.de
Konformitätserklärung
EC-Konformitätserklärung EC-Declaration of -Conformity
EC- Déclaration de conformité EC-Declaración de Conformidad
EC-Dichiarazione di conformità EC-Conformiteitverklaring
EC- Declaração de conformidade EC- Prohlášení o shode
EC-Deklaracja zgodności EC-Заявление осоответствии
D Konformitäts-
erklärung
Wir erklären hiermit, dass das Produkt, auf das sich diese Erklärung bezieht,
mit den nachstehenden Normen übereinstimmt.
GB Declaration of
conformity
We hereby declare that the product to which this declaration refers conforms
with the following standards.
CZ Prohlášení o
shode
Tímto prohlašujeme, že výrobek, kterého se toto prohlášení týká, je v souladu
s níže uvedenými normami.
E Declaración de
conformidad
Manifestamos en la presente que el producto al que se refiere esta
declaración está de acuerdo con las normas siguientes
F Déclaration de
conformité
Nous déclarons avec cela responsabilité que le produit, auquel se rapporte la
présente déclaration, est conforme aux normes citées ci-après.
I Dichiarazione di
conformitá
Dichiariamo con ciò che il prodotto al quale la presente dichiarazione si riferi-
sce è conforme alle norme di seguito citate.
NL Conformiteit-
verklaring
Wij verklaren hiermede dat het product, waarop deze verklaring betrekking
heeft, met de hierna vermelde normen overeenstemt.
P Declaração de
conformidade
Declaramos por meio da presente que o produto no qual se refere esta
declaração, corresponde às normas seguintes.
PL Deklaracja
zgodności
Niniejszym oświadczamy, że produkt, którego niniejsze oświadczenie
dotyczy, jest zgodny z poniższymi normami.
RUS Заявление о
соответствии
Мы заявляем, что продукт, ккоторому относится данная декларация,
соответствует перечисленным ниже нормам.
Electronic Scale: KERN MBB
Date: 24.09.2009 Signature:
Gottl. KERN & Sohn GmbH
Management
Gottl. KERN & Sohn GmbH, Ziegelei 1, D-72336 Balingen, Tel. +49-[0]7433/9933-0,Fax +49-[0]7433/9933-149
Mark applied EU Directive Standards
2004/108/EC EN 61000-6-1 : 2007
EN 61000-6-3 : 2007
2006/95/EC EN 60950 : 2006

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3 Basic directions (general information)
3.1 Intended use
The scale is used to determine weight of babies in lying positions or persons and in-
tended for private use only. The use of this scale in health service is forbidden.
To carry out weighing, lay down or seat a child or person on the scale plate. The
weighing value can be read off after a stable weighing value has been obtained.
Before any use, the scale must be checked for correct condition by the authorised
person.
Additional information on the baby scale:
Baby scales are intended for weighing babies in lying positions. If a baby is to be
weighed in a sitting position, it is to be seated in the centre of the scale pan.
To avoid falls, babies that are on the scale pan should be under
continuous observation. Follow the direction placed on the scale pan!
3.2 Inappropriate use
Do not use the scale for dynamic weighing. In the event that small quantities are re-
moved or added to the material to be weighed, incorrect weighing results can be dis-
played due to the “stability compensation“ in the scale!
(Example: Slowly draining fluids from a container on the scale.)
Do not leave a permanent load on the weighing plate. This can damage the measur-
ing equipment.
Be sure to avoid impact shock and overloading the scale in excess of the prescribed
maximum load rating (max.), minus any possible tare weight that is already present.
This could cause damage to the scale.
Never operate the balance in hazardous locations. The series design is not explo-
sion-proof.
Construction alterations may not be made to the scale. This can lead to incorrect
weighing results, faults concerning safety regulations as well as to destruction of the
scale.
The scale may only be used in compliance with the described guidelines. Other areas
of application/planned use must be approved by KERN in writing.

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3.3 Guarantee
The guarantee shall become void in the event of the following:
non-observation of our guidelines in the Operating Instructions,
use outside the described applications,
alteration to or opening of the device,
mechanical damage or damage caused by media, liquids,
usual wear and tear,
inappropriate erection or electric installation,
overloading of the measuring equipment,
allowing the scale to fall down.
3.4 Monitoring the test substances
The metrology features of the balance and any possible available adjusting weight
must be checked at regular intervals within the scope of quality assurance. For this
purpose, the responsible user must define a suitable interval as well as the nature
and scope of this check. Information is available on KERN’s home page (www.kern-
sohn.com) with regard to the monitoring of balance test substances and the test
weights required for this. Test weights and balances can be adjusted quickly and at a
reasonable price at KERN’s accredited DKD (Deutsche Kalibrierdienst) calibration
laboratory (return to national standard).
In the case of the scales for weighing people provided with the scale to determine a
body size, it is recommended to carry out the check of its measuring accuracy be-
cause determination of the human body size is always connected with a very large
inaccuracy.

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4 Basic safety directions
4.1 Observing the directions included in the Operating Instructions
Please read these Operating Instructions carefully before erecting and commission-
ing the balance, even if you already have experience with KERN balances.
4.2 Staff training
The device may only be operated and maintained by trained members of staff.
5 Transport and storage
5.1 Check upon delivery
Please check the packaging immediately upon delivery and the device during un-
packing for any visible signs of external damage.
5.2 Packaging
Please keep all parts of the original packaging in case it should be necessary to return
items at any time.
Only the original packaging should be used for return shipments.
Before any shipment, disconnect all cables and loose/movable parts.
Install transport protection elements (if any). All parts such as weighing plate, mains
adapter, stand, operating panel etc. must be protected against sliding down or dam-
age.
6 Unpacking, installation and starting
6.1 Place of installation, place of use
The scale is designed in such a way that reliable weighing results can be achieved
under normal application conditions.
By selecting the correct location for your scale, you will be able to work quickly and
precisely.
Therefore, please observe the following when choosing a place of installation:
- Place the scale on a firm, level surface;
- Avoid extreme heat as well as temperature fluctuation caused by installing the
scale next to a radiator or in the direct sunlight;
- Protect the scale against direct draughts due to open windows and doors;
- Avoid shaking during weighing;
- Protect the scale against high humidity, vapours and dust;
- Do not expose the device to extreme dampness for longer periods of time. In-
admissible bedewing (condensation of air moisture on the device) can occur if
a cold device is taken into a significantly warmer environment. In this case,
please keep the device for approx. 2 hours at room temperature after it has
been disconnected from mains supply;
- Avoid static charge build-up on the scale and people to be weighed;
- Avoid contact with water.

MBB-BA-e-0911 9
Major display deviations (incorrect weighing results) are possible if electromagnetic
fields occur as well as due to static charging and instable power supply. It is neces-
sary then to change the scale location.
6.2 Unpacking
Carefully remove individual scale parts or the whole scale from its packaging and po-
sition the scale in its intended working location. When the mains adapter is used, be
careful not to cause the danger of falling over the power cable.
6.2.1 Scale assembly and positioning
Pay attention that the scale plate is precisely levelled.
4 levelling rubber feet of the baby scale should be adjusted in such a way that the air
bubble in the level (located at the right side next to the cable inlet in the operating
panel) is in the centre.

MBB-BA-e-0911
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1. Slide the front part of the scale
pan (indicated with the arrow)
onto the scale plate fully home.
2. Tighten the fixing screws, lo-
cated in the lower part of the
scale pan, into the lower hous-
ing.
3. Totally tighten the other fixing
screws.
4. Tighten securely the wall
bracket to the terminal with the
supplied thumb screws.

MBB-BA-e-0911 11
6.2.2 List of items delivered / Standard accessories:
•Mains adapter
•Wall bracket (with mounting screws)
•Operating Instructions
6.2.3 Mounting instructions for model with wall bracket
6.3 Mains socket
Power supply is carried out by using the external mains adapter. The printed voltage
value must comply with local voltage. Only original KERN mains adapters should be
used.
6.4 Battery operation (inserting and removing batteries)
To open the battery compartment in models where there is no direct access to the
display back side, undo two black handwheels located at both sides of the display
and remove the display from the holder. Remove the battery cover on the underside
of the display. Insert 6 x 1.5 V (AA) batteries. Replace the battery cover and if neces-
sary retighten the display to the holder by using two black handwheels.
To preserve battery life, the scale switches off automatically after 3 minutes if no
weighing has taken place. Other switch off times can be set in the menu („A.OFF”
function), refer to chapter 6.7. When the batteries are exhausted, the display will
show the „LO” symbol. Press the [ON/OFF] key and change the batteries at once.
When the scale is not in use for a longer period of time, remove the batteries and
keep them separately. Leakage of battery liquid might damage the scale.
6.5 Initial start-up
To achieve accurate weighing results with the electronic balances, the appropriate
operating temperature must be provided for them (refer to „Warm-up time”, chapter
1). During the warm-up time, the scale must be connected to the power supply and
switched on (mains socket, batteries).
The accuracy of the scale depends on the local acceleration of the fall.
Please be sure to observe the information included in the chapter on „Adjustment”.

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6.6 Adjustment
As the acceleration value due to gravity is not the same at every location on earth,
each balance must be coordinated - in compliance with the underlying physical
weighing principle - to the existing acceleration due to gravity at its place of location (
only if the balance has not already been adjusted to the location in the factory). This
adjustment process must be carried out during the initial start-up, after change in lo-
cation and variation of surrounding temperature. It is also recommended to adjust the
balance periodically during weighing operation in order to obtain exact measured val-
ues.
With the built-in calibration weight (refer to the chapter on „Technical data”) it is
possible to check and set the scale accuracy at any time.
6.6.1 Procedure when adjusting
Observe stable environmental conditions. The warm-up time (refer to the chapter on
„Technical data”) is required to ensure the scale stabilisation.
Operation Display
Turn the scale on using the [ON/OFF] key.
a
z000
Press and keep the [→0←] key pressed for about 3
seconds until the display shows successively the
„SETUP” and „9rAD” symbol.
SETUP

9RAD
Press the [TARE] key until the „CAL ib” symbol is
displayed.
CAL
K
B
Press the [HOLD] key
CAL O
Press the [TARE] key. (display zeroing mode)
30770
Press the [→0←] key repeatedly until the „CAL 0”
symbol is displayed.
CAL O

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Press the [HOLD] key
CAL 5
Press the [TARE] key
Enter the required calibration weight value (refer to
chapter 1, „Technical data”): Select the item to be
changed with the HOLD key and set its numerical
value with the [TARE] key.
u000
Confirm by pressing the [→0←] key.
0
Place the calibration weight carefully in the centre of
the scale plate, and the display will show a numerical
value. Press the [HOLD] key. The adjustment process
is started.
82077
When the adjustment is finished successfully, the
scale is automatically switched over to the weighing
mode again and the calibration weight value will be
displayed.
Remove the calibration weight.
u000
Switch off the scale with the [ON/OFF] key.
6.7 Menu overview
Navigation in menu:
When the scale is switched on, press and keep the [→0←] key pressed for
about 3 seconds until the display shows successively the „SETUP” and
„9rAD” symbol.
Press the [TARE] key repeatedly until the required function is displayed.
Confirm the selected function with the [HOLD] key. The first parameter will be
displayed. Select the required parameter with the [HOLD] key and confirm the
selection with the [TARE] key.
To exit the menu and save the settings, press the [TARE] key until the „END”
symbol is displayed and then confirm with the [HOLD] key. The scale is automatically
returned to the weighing mode.
Selection is carried out with the [HOLD] and [TARE] key.

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Menu overview KERN MBB 15K5:

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Menu overview KERN MBB 20K5:

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Description:
Scale divisions, weighing range (max.) and read-out (d)
Selection of multi-range / single-range scale
Single-range scale
Multi-range scale
Automatic zero tracking: 0,25 d/ 0,5 d/ 1 d/ 3 d/ OFF
Stabilisation range: 0,25 d/ 0,5 d/ 1 d/ 3 d/ OFF
Zero range: 2% / 100%
Overload range: 9 d / 2%
Adjusting
Auto off function: 120 s / 180 s / 240 s / 300 sec/ OFF
Audible signal: ON/OFF
Restoring the factory settings (default settings)
Exiting the menu

MBB-BA-e-0911 17
7 Operation
7.1 Operating elements
7.1.1 Display
7.1.2 Display view
No. Display Description
1 [→0←]Scale zero display: If the scale does not show exactly
zero value although the scale pan is unloaded, press the
[→0←] key. After a short waiting time, the scale will be
zeroed again.
2 [ο]Stabilisation display:
If the display shows the stabilisation display [ο], the
scale is in the stable condition. When the scale is in the
unstable condition, the stabilisation display [ο] disappears.
3 It is illuminated when mains supply is via the mains
adaptor.
4 HOLD
SHold function / saving function is active
5 NET
SThe net weight is displayed.
6 WEIGHT
SThe present weight value is displayed.

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7.1.3 Overview of keyboard
Key Keyboard
ON/OFF Switching on/off the scale
0The scale is reset to 0.0 kg display.
It is possible to set max. up to 2% or 100% of maximal load
(possibility of selection in the menu)
HOLD Hold function / determination of average value
TARE Taring the scale
8 Using the scale
8.1 Weighing
Switch on the scale with the [ON/OFF] key. The diagnostic scale self-check is
performed and then the software version is displayed. The scale is ready for
weighing when the „0,00 kg” weight display is shown.
Direction: The [→0←]key makes it possible to zero the scale if necessary and
at any time.
Place a person in the middle of the scale or lay down a baby on the scale pan.
Wait until the stability display (ο) is shown and then read the weighing result.
Direction:
If a person is heavier than the weighing range, the display will show the „Err” symbol
(= overload).
8.2 Taring
The dead weight of any initial load used for weighing may be tared away by pressing
the key, so that the following weighing shows the real weight of a person to be
weighed.
E.g. when a rubber mat is put on the scale plate, the scale does not
show 0 value.
To start the taring process, press the [TARE] key. Now internal weight
saving is performed and value of 0.0 kg is displayed.
Place a person in the middle of the scale plate.
Then read the weight on the display.
Direction:
The scale can store only one tare value.
When the scale is unloaded, the saved tare value is displayed with „negative” sign.
To delete the saved tare value, unload the scale plate and then press the [TARE]
key.

MBB-BA-e-0911 19
8.3 HOLD function
The scale is provided with the integrated hold function (determination of average
value). It enables babies to be weighed accurately although they are not still on the
scale plate.
Note: Determination of average value is not possible when a baby moves too much.
Switch on the scale with the [ON/OFF] key. The diagnostic scale self-check is
performed. The scale is ready for weighing when the „0,00 kg” weight display
is shown.
Lay down a baby in the centre of the scale plate.
Press the [HOLD] key. When the triangle is flashing on the display, the scale
takes some measuring values and then the calculated average value is dis-
played.
Press the [HOLD] key again to return the scale to the normal weighing mode.
Pressing the [HOLD] key makes it possible to activate the function at any
time.
9 Error messages
The following messages can be shown on the display during switching on or using
the scale.
ERRL: Too small weight on the scale.
ooooo: The scale plate was loaded during switching on the scale. Unload the scale
plate.
ERR: Overload, too large weight on the scale plate.
10 Service, maintenance, disposal
10.1 Cleaning
Please disconnect the device from the power supply source before cleaning.
Do not use aggressive cleaning agents (solvents or similar agents), but a cloth damp-
ened with mild soap suds or cleaning agent. Ensure that no liquid penetrates into the
device and wipe the device with a dry soft cloth.
Loose impurities can be removed carefully by using a brush or hand vacuum cleaner.
Do not tilt or turn the scale to carry out its cleaning because this may result in the
scale damage.
Remove any impurities immediately.
10.2 Service, maintenance
The device may only be operated and maintained by trained service technicians who
are authorised by KERN.
Disconnect the scale from mains supply before its opening.
10.3 Disposal
Disposal of packaging and device must be carried out by an operator according to
valid national or regional law of the location where the device is used.

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11 Troubleshooting
The scale should be switched off for a short time following an interruption in the pro-
gram sequence and disconnected from mains supply. It is then necessary to repeat
the weighing process from the beginning.
Help:
Interruption Possible cause
Weight display is not illumi-
nated. •The scale is not switched on.
•The mains supply connection has been interrupted
(mains cable not plugged in/faulty).
•Mains failure.
•Batteries are incorrectly inserted or discharged
•No batteries.
Weight display changes
continuously •Draught/air movement
•Table/floor vibrations
•The weighing plate is in contact with foreign mat-
ters or is installed incorrectly.
•Electromagnetic fields/static charging (choose a
different location for the scale, switch off an inter-
fering device if possible)
The weighing result is obvi-
ously incorrect •The scale display is not set to zero
•Incorrect adjustment.
•Great fluctuations in temperature.
•Warm-up time was ignored.
•Electromagnetic fields/static charging (choose a
different location for the scale, switch off an inter-
fering device if possible)
Should other error messages occur, switch the scale off and then on again. If the er-
ror message remains, inform the manufacturer.